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Cross-Modal Haptic Compression Inspired by Embodied AI for Haptic Communications

IEEE Transactions on Multimedia 2025年

作者： Lu, Hang Tan, Xinmeng Chen, Mingkai Zhang, Zhe Zhang, Xuguang Chen, Jianxin Wei, Xin Zhao, Tiesong Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology China Fuzhou University Fujian Key Laboratory for Intelligent Processing and Wireless Transmission of Media Information College of Physics and Information Engineering Fuzhou350108 China Fuzhou University Fujian Science & Technology Innovation Laboratory for Optoelectronic Information Fuzhou350108 China

Haptic data compression has gradually become a key issue for emerging real-time haptic communications in Tactile Internet (TI). However, it is challenging to achieve a tradeoff between high perceptual quality and compression ratio in haptic data compression scheme. Inspired by the perspective of embodied AI, we propose a cross-modal haptic compression scheme for haptic communications to improve the perception quality on TI devices in this paper. Since multimodal fusion is routinely employed to improve the ability of system in cognition, we assume that haptic codec is guided by visual semantics to optimize parameter settings in the coding process. We first design a multi-dimensional tactile feature fusion network (MTFFN) relying on multi-head attention mechanism. The MTFFN extracts the multi-dimensional features from the material surface and maps them to infer the coding parameters. Secondly, we provide second-order difference and linear interpolation to establish an criterion for the determination of optimal codec parameters, which are customized by the material categories so as to give high robustness. Finally, the simulation results reveal that our compression scheme can efficiently make a personalized codec procedure for different materials, obtaining more than 17% improvement in terms of compression ratio with high perceptual quality at the same time. © 2025 IEEE.

关键词： Data compression ratio

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High-accuracy analytic characterization of whispering gallery modes based on modified quantum potential

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Optics and Laser technology 2025年 189卷

作者： Chen, Tong Zhang, Hao Wang, Chao Yang, Miaoling Wang, Qian Shan, Xiaoli Cai, Jianyu Lin, Wei Duan, Shaoxiang Liu, Bo Institute of Modern Optics College of Electronic Information and Optical Engineering Nankai University Tianjin300350 China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Nankai University Tianjin300350 China School of Engineering University of Kent Jennison Building CanterburyCT2 7NT United Kingdom Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology Nankai University Tianjin300350 China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai519000 China

Several approaches have been proposed for the modal analysis of whispering gallery mode (WGM) microcavities, however, all of these modal analysis schemes have their limitations in applicability and simplicity. In this work, we develop a universal WKB-approximation-based analytic modal analysis approach applicable for the microresonators integrated with negative permittivity materials as well as their counterparts made of positive permittivity medium. For the microcavities with negative permittivity coating, the calculation results in terms of the resonance frequency show good accordance with the FDTD simulation results for low-order modes. And for those based on positive permittivity medium, the calculation results of resonance wavelength using WKB-approximation approach show trivial deviations on an angstrom level in comparison with the eigenequation solutions. Moreover, mode selection at specific resonance wavelengths has been studied based on quasi-quantum description of light field, which would be valuable for mode-switching applications of WGM microresonators. The analytic modal analysis method proposed in this study is also applicable for the microresonators made of inhomogeneous medium, where specific mode properties can be achieved by optimizing the potential function, which paves a new way toward developing WGM photonic devices with versatile functionalities. © 2025

关键词： Whispering gallery modes

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All-in-one Cascadable Dynamic Terahertz Logic Gates Enabled by Polarization Encoding and Multiplexing

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Laser and Photonics Reviews 2025年

作者： Wang, Yu Cheng, Jierong Fan, Fei Peng, Yan Liu, Yan Chang, Shengjiang Zhuang, Songlin Nankai University Institute of Modern Optics 38 Tongyan Road Tianjin300350 China Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology Tianjin300350 China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin300350 China University of Shanghai for Science and Technology Terahertz Technology Innovation Research Institute Shanghai200093 China Shandong Inspur Artificial Intelligence Research Institute Co. Ltd Shandong Yunhai Guochuang Cloud Computing Equipment Industry Innovation Co. Ltd. Shandong250013 China

Metasurfaces bring an advanced paradigm for optical computing through extraordinary beam manipulation. A metasurface logic gate needs function multiplexing to process different input signals. Integration of multiple gates in one design further increases the multiplexing channels, which necessitates the diffractive neural networks with challenges of decreased system stability, difficulty for connection, and large insertion loss. Here an optical logic gate is demonstrated by sequentially encoding the input signals into polarization and decoding through a 4-polarization-multiplexed metasurface. By introducing an idler polarization state, a convenient strategy is developed to integrate and dynamically switch 4 or full 7 logic gates in a single module through overall polarization rotation and proper polarization-truth multiplexing relation. The all-in-one logic gate is validated at 140 GHz through the steady-state and dynamic test, with the resulting contrast of 6.5 dB, flexible test ranges of 80 mm, and insertion loss of 2.2 dB. The computing result is represented by both the focusing position and the polarization, with the later as a consistent input and output physical quantity for cascading. Cascaded AND–AND gates and AND-OR gates are demonstrated with 6 dB result contrast, showing great promise for building robust logic systems for future optical signal processing. © 2025 Wiley-VCH GmbH.

关键词： Signal encoding

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arXiv

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arXiv 2025年

作者： Liu, Zhiyang Yang, Dong Zhang, Minghao Sun, Hanyu Wu, Hong Wang, Huiying Shen, Wen Chai, Chao Xia, Shuang College of Electronic Information and Optical Engineering Nankai University Tongyan Road Tianjin Tianjin300350 China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tongyan Road Tianjin Tianjin300350 China Department of Radiology Imaging Medicine Institute of Tianjin Tianjin First Central Hospital School of Medicine Nankai University Fukang Road Tianjin Tianjin300192 China

Despite that deep learning (DL) methods have presented tremendous potential in many medical image analysis tasks, the practical applications of medical DL models are limited due to the lack of enough data samples with manual annotations. By noting that the clinical radiology examinations are associated with radiology reports that describe the images, we propose to develop a foundation model for multi-model head MRI by using contrastive learning on the images and the corresponding radiology findings. In particular, a contrastive learning framework is proposed, where a mixed syntax and semantic similarity matching metric is integrated to reduce the thirst of extreme large dataset in conventional contrastive learning framework. Our proposed similarity enhanced contrastive language image pretraining (SeLIP) is able to effectively extract more useful features. Experiments revealed that our proposed SeLIP performs well in many downstream tasks including image-text retrieval task, classification task, and image segmentation, which highlights the importance of considering the similarities among texts describing different images in developing medical image foundation models. Copyright © 2025, The Authors. All rights reserved.

关键词： Semantics

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Propagation characteristics of photonic crystal fibers selectively filled with ionic liquid

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Nanotechnology and Precision Engineering 2021年第1期4卷 1-6页

作者： Xiaoqi Liu Yange Liu Zhi Wang Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Institute of Modern OpticsNankai UniversityTianjin 300350China

We present a numerical and experimental study of the propagation characteristics of photonic crystal fibers(PCFs)selectively filled with ionic liquid(IL;1-butyl-3-methylimidazolium iodine).Three types of IL-filled PCF are investigated:one with all air holes filled,one with an IL-filled air hole in the second ring,and one with an IL-filled air hole in the third *** results show that the third type of IL-filled PCF is the most sensitive to temperature;the sensitivity of resonant dips between the LP01 and LP21 modes is−2.9 nm/***,the intensity of the resonant dips changes with the polarization angle of the light source;the sensitivity is−0.79 dB per unit polarization *** on this property,IL-filled PCFs with different utilities can be realized by changing the filling position ***,IL-filled PCFs can be used under flexible conditions and controllable temperatures to create a compact polarization-angle sensor.

关键词： Photonic crystal fiber Ionic liquid Optical sensor Polarization

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A twist sensor based on polarization-maintaining fibers with different cladding diameters

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Nanotechnology and Precision Engineering 2021年第2期4卷 1-8页

作者： Xiaoqi Liu Yange Liu Zhi Wang Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Institute of Modern OpticsNankai UniversityTianjin 300350China

A fiber twist sensor using a Sagnac interferometer incorporating a tapered polarization-maintaining fiber(PMF)is *** transmission properties of the sensor are investigated both theoretically and *** the optoelastic effect,which depends on fiber geometry,the modal and group birefringences of the PMF can be controlled by applying different twist *** spectral wavelength shifts,free spectral ranges,and transmission losses of the original,microtapered,and etched PMFs were ***,the interference dips for the etched PMF move in opposite *** a result,the proposed PMF-based sensor could have multiparameter sensing applications.

关键词： Fiber-optic Fiber-optic sensor Polarization-maintaining Twist sensor

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Terahertz polarization conversion and sensing with double-layer chiral metasurface

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Chinese Physics B 2020年第7期29卷 164-171页

作者： Zi-Yang Zhang Fei Fan Teng-Fei Li Yun-Yun Ji Sheng-Jiang Chang Institute of Modern Optics Nankai UniversityTianjin 300350China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin 300350China

The terahertz(THz)resonance,chirality,and polarization conversion properties of a double-layer chiral metasurface have been experimentally investigated by THz time domain spectroscopy system and polarization detection *** special symmetric geometry of each unit cell with its adjacent cells makes a strong chiral electromagnetic response in this metasurface,which leads to a strong polarization conversion ***,compared with the traditional THz transmission resonance sensing for film thickness,the polarization sensing characterized by polarization elliptical angle(PEA)and polarization rotation angle(PRA)shows a better Q factor and figure of merit(FoM).The results show that the Q factors of the PEA and PRA reach 43.8 and 49.1 when the interval film is 20µm,while the Q factor of THz resonance sensing is only *** these PEA and PRA can play a complementary role to obtain a double-parameter sensing method with a higher FoM,over 4 times than that of resonance *** chiral metasurface and its polarization sensing method provide new ideas for the development of high-efficiency THz polarization manipulation,and open a window to the high sensitive sensing by using THz polarization spectroscopy.

关键词： terahertz chiral metasurface polarization conversion sensing

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Multimode oscillation Q-switched erbium-doped fiber laser with a few-mode fiber cavity

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optoelectronics Letters 2018年第6期14卷 417-420页

作者： HAN Si-meng YANG Kang WANG Zhen-hong LIU Yan-ge WANG Zhi Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Institute of Modern Optics Nankai University

We propose and demonstrate experimentally a multimode oscillation Q-switched erbium-doped fiber laser with a few-mode fiber cavity. The different coupling processes of reflection peaks of fiber Bragg gratings(FBGs) which act as cavity mirrors allow the different oscillating states. We obtain microsecond light pulse output states whose oscillation and output beams have different mode compositions, including high order mode. Such a structure enables the high order mode oscillation in the whole cavity with an all-fiber structure, which has potential applications in mode-division multiplexed systems and research of multimode nonlinear effect.

关键词： Multimode oscillation Q-switched few-mode fibercavity

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A biosensor based on a modified S-taper fiber for target protein detection

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Nanotechnology and Precision Engineering 2020年第3期3卷 162-166页

作者： Xiaoqi Liu Yange Liu Zhi Wang Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Institute of Modern OpticsNankai UniversityTianjin 300350China

A biosensor based on a modified S-taper fiber was proposed and experimentally demonstrated for antigen detection. Antibody was immobilized over the activated S-taper waist, where the fiber detected the interaction between the antibody and target antigen. Compared with a unmodified S-taper fiber structure, the silanized fiber had a detection limit of approximately 8.33 × 10-5 RIU when the concentration of antigen solution was changed1%. The antibody and antigen binding processing was monitored in real time by analyzing and investigating the transmission spectral characteristics of the modified S-taper fiber. The cost-effectiveness, real-time detection,and high integration properties of the fiber enable its use in a modal interferometer for biosensing applications including disease diagnosis and biological specificity recognition.

关键词： Photonic crystal fibers Biosensor S-taper fiber Immobilization process

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Prediction of Intrinsically Disordered Proteins Based on Deep Neural network-ResNet18

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 905-917页

作者： Jie Zhang Jiaxiang Zhao Pengchang Xu School of Electronic Information and Optical Engineering Nankai UniversityTianjin Key Laboratory of Optoelectronic Sensor and Sensing Network TechnologyTianjin300350China

Accurately,reliably and rapidly identifying intrinsically disordered(IDPs)proteins is essential as they often play important roles in various human diseases;moreover,they are related to numerous important biological ***,current computational methods have yet to develop a network that is sufficiently deep tomake predictions about IDPs and demonstrate an improvement in *** this study,we constructed a deep neural network that consisted of five identical variant models,ResNet18,combined with an MLP network,for ***18 was applied for the first time as a deep model for predicting IDPs,which allowed the extraction of information fromIDP residues in greater detail and depth,and this information was then passed through the MLP network for the final identification *** well-known datasets,MXD494 and R80,were used as the blind independent datasets to compare their performance with that of our *** simulation results showed that Matthew’s correlation coefficient obtained using our deep network model was 0.517 on the blind R80 dataset and 0.450 on the MXD494 dataset;thus,our method outperformed existing methods.

关键词： ResNet18 MLP intrinsically disordered protein

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